Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X100
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X100 is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø50mm bore, 100mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke100 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X100
The B04-SCD50X100 is an AirTAC construction-machinery dedicated double-rod cylinder, mechanically identical to the standard SCD50X100. The B04- prefix simply designates its fulfillment within AirTAC's heavy-equipment builder program, maintaining the exact same 50 mm bore and 100 mm stroke. Because the piston rod passes through both end caps, it delivers an identical 825 N of thrust and pull force at 0.5 MPa.
This symmetric design is ideal for dual-tooling or non-rotating actuation tasks on job-site equipment. The cylinder features a Ø20 mm rod on both ends, PT1/4 ports, and adjustable cushions with a 21 mm length to soften end-of-stroke impacts. Its retracted length is governed by the 207 mm body length A(SCD), making it longer than a comparable single-rod unit.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X100 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X100 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 100 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCD (double-rod) datasheet. Because the rod runs through both caps, the effective area is (bore² − rod²) in both directions. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 kgf | |
Push and pull are EQUAL on a double-rod cylinder — both chambers lose the rod area, so effective area = (bore² − rod²) each way. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X100
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×100 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCJ (adjustable stroke), SCT (multi-position). SCD mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X100 Is Used
Excavator Control Linkages
Provides equal push and pull force for pilot valve actuation or secondary linkage positioning on heavy earthmoving equipment.
Shuttle Transfer Tables
Drives bidirectional material shuttles where tooling is mounted on both rod ends to push or pull loads symmetrically.
Non-Rotating Pushers
Utilizes the dual-rod structure to resist torsional twist when pushing heavy construction components into alignment.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X100 the Right Cylinder?
Choose this 50 mm bore when an application demands 825 N of equal force in both directions. If your machine requires less thrust, stepping down to the 40 mm bore yields 528 N each way, while upgrading to the 63 mm bore provides 1402 N. For tasks needing force in only one direction, the single-rod AirTAC SC cylinder is a lighter, more compact alternative. If the mechanism experiences heavy side loads, a dedicated guided cylinder is preferable, as the through rod improves guidance but cannot replace a true linear bearing.
To replace this unit, match these five attributes: 50 mm bore, 100 mm stroke, PT1/4 port thread, basic mounting (or an SCD-compatible accessory like F-SC50LB), and no internal magnet. Since the stroke is 100 mm, rod bending is minimal, but always verify the external load is supported.
Double-rod checklist
- ✓ Need equal force / speed both directions?
- ✓ Rear rod for tooling, stopper or sensor flag?
- ✓ Better rod guidance / anti-rotation?
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Keep BOTH rod ends clear of side load and interference.
- check Adjust end cushion screws for smooth stops.
- check Use SCD mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X100 FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the SCD50X100. It is mechanically identical to the standard model, offering the same 825 N equal push/pull force, PT1/4 ports, and 100 mm stroke, simply designated for heavy-equipment builders.
A double-rod cylinder provides identical thrust and pull forces (825 N at 0.5 MPa here) because the rod area is subtracted from both chambers. It also allows mounting tooling or a sensor flag on the rear rod and offers better anti-rotation resistance than a single-rod unit.
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